Even better would be the full trilogy: The Shoes of the Fisherman, The Clowns of God and Lazarus.

There is a fourth book, Eminence, which also appears to be part of the series. It might be interesting right now because it is about an Argentinean Cardinal tortured in the 1970s. He is rescued and brought to Rome. A generation later, having rising within the hierarchy, a candidate for the papacy himself, he must confront his past.